pthread.h

usoc在北京博创兴业有限公司的实验平台s3c2410上运行。 2. 各实验的全部源代码分别存放在各实验目录下面。

int pthread_attr_setstacksize (pthread_attr_t *attr,
                                       size_t stacksize);

// Get current minimal stack size.
int pthread_attr_getstacksize (const pthread_attr_t *attr,
                                       size_t *stacksize);


//=============================================================================
// Dynamic package initialization

// Initializer for pthread_once_t instances
#define PTHREAD_ONCE_INIT       0

// Call init_routine just the once per control variable.
int pthread_once (pthread_once_t *once_control,
                          void (*init_routine) (void));


//=============================================================================
//Thread specific data

// Create a key to identify a location in the thread specific data area.
// Each thread has its own distinct thread-specific data area but all are
// addressed by the same keys. The destructor function is called whenever a
// thread exits and the value associated with the key is non-NULL.
int pthread_key_create (pthread_key_t *key,
                                void (*destructor) (void *));

// Delete key.
int pthread_key_delete (pthread_key_t key);

// Store the pointer value in the thread-specific data slot addressed
// by the key.
int pthread_setspecific (pthread_key_t key, const void *pointer);

// Retrieve the pointer value in the thread-specific data slot addressed
// by the key.
void *pthread_getspecific (pthread_key_t key);


//=============================================================================
// Thread Cancellation

//-----------------------------------------------------------------------------
// Data structure used to manage cleanup functions

struct pthread_cleanup_buffer
{
    struct pthread_cleanup_buffer *prev;        // Chain cleanup buffers
    void (*routine) (void *);     	        // Function to call
    void *arg;				        // Arg to pass
};

//-----------------------------------------------------------------------------
// Thread cancelled return value.
// This is a value returned as the retval in pthread_join() of a
// thread that has been cancelled. By making it the address of a
// location we define we can ensure that it differs from NULL and any
// other valid pointer (as required by the standard).

extern int pthread_canceled_dummy_var;

#define PTHREAD_CANCELED                ((void *)(&pthread_canceled_dummy_var))


//-----------------------------------------------------------------------------
// Cancelability enable and type

#define PTHREAD_CANCEL_ENABLE           1
#define PTHREAD_CANCEL_DISABLE          2

#define PTHREAD_CANCEL_ASYNCHRONOUS     1
#define PTHREAD_CANCEL_DEFERRED         2

//-----------------------------------------------------------------------------
// Functions

// Set cancel state of current thread to ENABLE or DISABLE.
// Returns old state in *oldstate.
int pthread_setcancelstate (int state, int *oldstate);

// Set cancel type of current thread to ASYNCHRONOUS or DEFERRED.
// Returns old type in *oldtype.
int pthread_setcanceltype (int type, int *oldtype);

// Cancel the thread.
int pthread_cancel (pthread_t thread);

// Test for a pending cancellation for the current thread and terminate
// the thread if there is one.
void pthread_testcancel (void);

// Install a cleanup routine.
// Note that pthread_cleanup_push() and pthread_cleanup_pop() are macros that
// must be used in matching pairs and at the same brace nesting level.
#define pthread_cleanup_push(routine,arg)                       \
    {                                                           \
        struct pthread_cleanup_buffer _buffer_;                 \
        pthread_cleanup_push_inner (&_buffer_, (routine), (arg));

// Remove a cleanup handler installed by the matching pthread_cleanup_push().
// If execute is non-zero, the handler function is called.
#define pthread_cleanup_pop(execute)                            \
        pthread_cleanup_pop_inner (&_buffer_, (execute));       \
    }


// These two functions actually implement the cleanup push and pop functionality.
void pthread_cleanup_push_inner (struct pthread_cleanup_buffer *buffer,
                                         void (*routine) (void *),
                                         void *arg);

void pthread_cleanup_pop_inner (struct pthread_cleanup_buffer *buffer,
                                        int execute);


//-----------------------------------------------------------------------------
// Mutex object

typedef struct
{
    void*   os_mutex;
} pthread_mutex_t;

// We do not implement PTHREAD_MUTEX_INITIALIZER
#undef PTHREAD_MUTEX_INITIALIZER

//-----------------------------------------------------------------------------
// Mutex attributes structure

typedef struct
{
    unsigned char prio;
} pthread_mutexattr_t;

//=============================================================================
// Mutexes

//-----------------------------------------------------------------------------
// Mutex attributes manipulation functions

// Initialize attribute object
int pthread_mutexattr_init ( pthread_mutexattr_t *attr);

// Destroy attribute object
int pthread_mutexattr_destroy ( pthread_mutexattr_t *attr);

// Set priority
int pthread_mutexattr_setpriority ( pthread_mutexattr_t *attr, int priority);

// Get priority
int pthread_mutexattr_getpriority ( pthread_mutexattr_t *attr, int* priority);

//-----------------------------------------------------------------------------
// Mutex functions

// Initialize mutex. If mutex_attr is NULL, use default attributes.
int pthread_mutex_init (pthread_mutex_t *mutex,
                                const pthread_mutexattr_t *mutex_attr);

// Destroy mutex.
int pthread_mutex_destroy (pthread_mutex_t *mutex);

// Lock mutex, waiting for it if necessary.
int pthread_mutex_lock (pthread_mutex_t *mutex);

// Try to lock mutex.
int pthread_mutex_trylock (pthread_mutex_t *mutex);


// Unlock mutex.
int pthread_mutex_unlock (pthread_mutex_t *mutex);

#if 0 /* We do not implement pthread condition variable */
//-----------------------------------------------------------------------------
// Condition Variable structure.
// Like mutexes, this must match the underlying eCos implementation class.

typedef struct
{
    int         dummy;
} pthread_cond_t;

#define PTHREAD_COND_INITIALIZER { 0, 0 }

//-----------------------------------------------------------------------------
// Condition variable attributes structure

typedef struct
{
    int         dummy;
} pthread_condattr_t;

//=============================================================================
// Condition Variables

//-----------------------------------------------------------------------------
// Attribute manipulation functions
// We do not actually support any attributes at present, so these do nothing.

// Initialize condition variable attributes
int pthread_condattr_init (pthread_condattr_t *attr);

// Destroy condition variable attributes
int pthread_condattr_destroy (pthread_condattr_t *attr);

//-----------------------------------------------------------------------------
// Condition variable functions

// Initialize condition variable.
int pthread_cond_init (pthread_cond_t *cond,
                               const pthread_condattr_t *attr);

// Destroy condition variable.
int pthread_cond_destroy (pthread_cond_t *cond);

// Wake up one thread waiting for condition variable
int pthread_cond_signal (pthread_cond_t *cond);

// Wake up all threads waiting for condition variable
int pthread_cond_broadcast (pthread_cond_t *cond);

// Block on condition variable until signalled. The mutex is
// assumed to be locked before this call, will be unlocked
// during the wait, and will be re-locked on wakeup.
int pthread_cond_wait (pthread_cond_t *cond,
                               pthread_mutex_t *mutex);

// Block on condition variable until signalled, or the timeout expires.
int pthread_cond_timedwait (pthread_cond_t *cond,
                                    pthread_mutex_t *mutex,
                                    const struct timespec *abstime);

#endif /* We do not implement pthread condition variable*/

#endif /* __UCOSII__ */
#endif /* UCOSII_PTHREAD_H */